Home / 11,947.80-17,900.10-10,565.40

Finding the Fourth Proportional to 11,947.80, 17,900.10 and 10,565.40

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Solution

The fourth proportional to 11,947.80, 17,900.10 and 10,565.40 is: 15,829.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.80 : 17,900.10 = 10,565.40 : x
  2. Step 2: Convert to fraction form
    11,947.80/17,900.10 = 10,565.40/x
  3. Step 3: Cross multiply
    11,947.80x = 17,900.10 × 10,565.40
  4. Step 4: Simplify right side
    11,947.80x = 189,121,716.54
  5. Step 5: Solve for x
    x = 189,121,716.54/11,947.80
  6. Step 6: Final answer
    x = 15,829.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.